ZeraTerraVerified Environmental Impact
into Tradable Assets
Methodology v1.0 · Immutable per batch

Carbon accounting, transparently.

Every factor configurable. Every calculation reproducible. Every credit batch locks the methodology version used at mint time — old credits stay auditable forever.

Version
v1.0
Grid regions
9
Tire types
5
Vehicle classes
4
Core principle

Net is not gross.

Most carbon platforms sell gross CO₂ avoided. We deduct grid emissions, tire wear, microplastic pollution, and charging losses before issuing a single credit. The credit you buy is what's left — that's the net climate value.

·
Gross avoided
−
Grid emissions
−
Tire penalty
−
Other penalties
=
Net benefit
Full formula stack

Every line, reproducible from scratch.

# Gross savings Gross ICE Emissions = miles_driven × ICE_baseline_factor_g_per_mi EV Operational Emit = miles × efficiency_kWh_per_mi × grid_factor_g_per_kWh Gross CO₂ Avoided = Gross ICE Emissions − EV Operational Emit # Tire-wear / microplastic penalty Tire Wear Rate = base × weight_mult × tire_type_mult × behavior_mult Tire Material Loss = miles × Tire Wear Rate // grams Tire CO₂e Penalty = Tire Material Loss × CO₂e_per_gram × material_risk_score # Other penalties Charging Inefficiency = EV Operational Emit × 0.08 # Net + credit Net CO₂e Benefit = Gross Avoided − Grid − Tire Penalty − Other Penalties Credit Contribution = max(0, Net CO₂e Benefit) / 1000 // 1 credit = 1 metric ton
Default multipliers

Configurable factors, locked per batch.

Vehicle weight
light1.00
standard1.10
heavy1.25
large suv pickup1.40
Tire type
low rolling resistance ev0.85
standard all season1.00
performance1.20
winter1.15
heavy duty1.25
Driving behavior
smooth0.90
normal1.00
aggressive1.25
Regional grid emissions

9 grid factors. Reality, not averages.

Where you charge matters. An EV in West Virginia (coal-heavy) emits ~3× the gCO₂/kWh of one in California. We track the grid factor per region the trip happened in, not a global average.

gCO₂e per kWh by region
US_AVG386
US_CA230
US_TX410
US_NY220
EU_AVG252
UK193
IN716
CN580
GLOBAL_AVG475
Worked example

10,000 kg gross becomes 7.05 credits.

Gross avoidedGrid emissionsTire penaltyOther penaltiesNet benefit03t5t8t10t
Gross
10,000 kg
−Grid
2,500 kg
−Tire
350 kg
−Other
100 kg
= Net
7,050 kg
Net 7,050 kg ÷ 1,000 = 7.05 credits (1 credit = 1 metric ton CO₂e)
Versioning & disclosures

Old credits stay auditable forever.

Each credit batch records exactly which methodology version minted it. New science → new version. Existing credits remain bound to the assumptions they were minted under — no retroactive changes, no rug-pulls.

v1.0
Today
active
v1.1
Q3 2026
brake + battery
v2.0
2027
registry-aligned
Disclosures on every credit
  • Calculations are estimates until verified by approved methodology
  • Tire-wear and microplastic deductions are included transparently
  • Charging inefficiency penalty of 8% applied to EV grid emissions
  • Methodology versions are immutable per credit batch

Methodology you can verify yourself.

Browse live credit batches with full deduction disclosure, dive into the tokenization layer, or explore every negative factor we deduct.